Table: Linoleic Acid, Mineral, and Vitamin Requirements of Leghorn-type Chickens a

Linoleic Acid, Mineral, and Vitamin Requirements of Leghorn-type Chickens ^a

Age	0–6 wk	6–18 wk	18 wk to 1st egg	Layers	Breeders
Linoleic acid (%)	1.00	1.00	1.00	1.00	1.00
Potassium (%)	0.25	0.25	0.25	0.15	0.15
Sodium (%)	0.15	0.15	0.15	0.15	0.15
Chlorine (%)	0.15	0.15	0.15	0.13	0.13
Magnesium (mg)	600	500	400	500	500
Manganese (mg)	60	30	30	20	20
Zinc (mg)	40	35	35	35	45
Iron (mg)	80	60	60	45	60
Copper (mg)	5	4	4	?	?
Iodine (mg)	0.35	0.35	0.35	0.035	0.01
Selenium (mg)	0.15	0.1	0.1	0.06	0.06
Vitamin A (IU)	1,500	1,500	1,500	3,000	3,000
Vitamin D₃ (IU)	200	200	300	300	300
Vitamin E (IU)	10	5	5	5	10
Vitamin K (mg)	0.5	0.5	0.5	0.5	1.0
Riboflavin (mg)	3.6	1.8	2.2	2.5	3.6
Pantothenic acid (mg)	10	10	10	2	7
Niacin (mg)	27	10	10	10	10
Vitamin B₁₂ (mg)	0.009	0.003	0.004	0.004	0.08
Choline (mg)	1,300	900	500	1,050	1,050
Biotin (mg)	0.15	0.1	0.1	0.1	0.1
Folacin (mg)	0.55	0.25	0.25	0.25	0.35
Thiamine (mg)	1.0	1.0	0.8	0.7	0.7
Pyridoxine (mg)	3	3	3	2.5	4.5
^a Requirements are listed as percentages or as units or mg/kg of diet. Assumes an average daily intake of 110 g of feed/hen/day.
Adapted, with permission, from Nutrient Requirements of Poultry, 1994, National Academy of Sciences, National Academy Press, Washington, DC.

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